Inspect the air assist lines and connections. Look for any loose connections, sharp bends or damage.

Install the intake air cleaner.

Attach the air cleaner hose.

Start the engine and check for fuel leaks.

TESTING

See Figures 23, 24 and 25

Correct testing of the fuel injectors requires specific equipment not usually available outside a dealership or a fuel lab. It is recommended that any checking or testing of the injectors, other than that included below, be left to a properly equipped service facility.

Injector operation can be checked with the injectors installed in the engine. A sound scope is needed here, a stethoscope-like device available from most auto tool and parts jobbers.

Fig. Fig. 23: A sound scope is usually used to inspect injector operation

Fig. Fig. 24: If a sound scope is not available, check the operation with your finger

With the engine running or cranking, check each injector for normal operating noise (a buzzing or humming), which changes in proportion to engine rpm. If a sound scope is not available to you, check injector operation by touching each injector with your finger. It should be buzzing. If no sound or an unusual sound is heard, check the wiring connector, or have the injector checked professionally.

With the engine
OFF
, measure injector resistance by unplugging the wiring connector from the injector, and connecting an ohmmeter across the injector terminals. Check the continuity at both terminals; resistance should be: cold 12-16 ohms. Resistance will vary with injector temperature.